Cell Membrane Structure Quiz

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What is the main function of the phospholipid bilayer?

Assisting in cellular tasks

Controlling the entry and exit of the cell (correct)

Stabilizing the cell membrane

Facilitating intercellular fluid movement

What is the hydrophobic region within the phospholipid bilayer primarily composed of?

Sterols

Proteins

Fatty acids (correct)

Carbohydrates

What role does diffusion play in the movement of molecules?

It causes molecules to move from low concentration to high concentration areas

It requires energy from the cell

It results from intrinsic thermal energy in molecules (correct)

It is not affected by temperature changes

What effect does the presence of sterols have on the cell membrane?

Stabilizes the membrane and makes it less permeable Signup and view all the answers

How do cells use energy to move molecules within the intercellular fluid?

Cells do not use any energy to move the molecules Signup and view all the answers

Which process allows the movement of water through a semi-permeable membrane from areas of high concentration to areas of low concentration?

Osmosis Signup and view all the answers

In a hypotonic solution, what happens to the water in relation to the cell?

Moves into the cell Signup and view all the answers

What is the term for the increase in pressure inside plant cells due to the movement of water molecules into the cells?

Turgor pressure Signup and view all the answers

What type of solutions have higher osmotic pressure in the fluid surrounding the cell, causing water to move out of the cell?

Hypertonic solutions Signup and view all the answers

Which type of proteins in the membrane help move molecules along the concentration gradient without additional energy input by the cell?

Transport proteins Signup and view all the answers

Cell Membrane Structure Quiz

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Questions and Answers

What is the main function of the phospholipid bilayer?

What is the hydrophobic region within the phospholipid bilayer primarily composed of?

What role does diffusion play in the movement of molecules?

What effect does the presence of sterols have on the cell membrane?

How do cells use energy to move molecules within the intercellular fluid?

Which process allows the movement of water through a semi-permeable membrane from areas of high concentration to areas of low concentration?

In a hypotonic solution, what happens to the water in relation to the cell?

What is the term for the increase in pressure inside plant cells due to the movement of water molecules into the cells?

What type of solutions have higher osmotic pressure in the fluid surrounding the cell, causing water to move out of the cell?

Which type of proteins in the membrane help move molecules along the concentration gradient without additional energy input by the cell?

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